Improvement in lathes



L 2Sheets--.Sheet1 B. B. &. A. I. UCKINGTUN.

. Lathes.

NolimJggm Patentedlune 9,1874.

llj 1 I WITNESSES v VENTUB al/ M M.

ATTDBNEYS.

U rrEn STATES PA ENT Orrroe.

BENJAMIN B. OOKINGTON AND ANDREW J. OOKINGTON, OF srnkrronn HOLLOW, NEW HAMPSHIRE.

IMPROVEMENTJN LATHE$.

Specification forming part of Letters Patent No. [51,794, dated June 9, 1874; application filed March 14, 1874.

To all whom it may concern:

Be it known that we, BENJAMIN B. OGKING- TON and ANDREW J. OOKINGTON, of Stratford Hollow, in the county of Coos and State of New Hampshire, have invented a new and Improved Lathe for rough-turnin' g bobbins and other articles, of which the following is a specification:

The invention will first be fully described, and then pointed out in the claim.

Figure l is a plan view of our improved machine. 'Fig. 2 is a section on the line 00 00 of Fig. 1. Fig. 3 is partly a side elevation and partly a sectional elevation.

Similar letters of reference indicate corre' sponding parts.

A represents a double stationary holder for the blanks B in the middle portion of the ma chine, into which the blocks are dropped on each side behind guards O, and upon rests D, to be taken therefrom by the lathe-center's E E and F F, said lathes being mounted on a frame, Gr, which slides forward and backward on the ways H, being actuated by the cam I and bar J .4 'The' lathes'are arranged on opposite sides of the blank-holder, so that when one moves up to it the other moves away from it. In front or outside of each lathe is a shaping cutter, K, so xed on the upper end of a swinging frame, J, that when the blank is moved outward it will come against the cutter, and be reduced to the required shape by it, the cutter being the whole length of the blank, and, 'after the blank comes against it, moving back with it during the time it operates on the blank, and until the frame carrying the lathes arrives at the'end of its move ment. The frame L carrying the cutter is then engaged by the spring-catch M, and held back while the lathe returns.

hen one lathe is in this outermost position against the cutter, the other is at the blankholder taking a blank, which is accomplished in the following manner: At the moment the centers come into the axial line of the blank, the hook or projection (tof the tail-center escapes oif the end of the switch N, and its spring 0 forces it forward into the end of the blank, and also forces the blank against the live-spindle; but, as the spring would not be reliable to force it fully onto points P, a guard, Q, is employed to hold the blank back, so that the end of the tail-stock will catch the dog It as the lathe moves toward the cutter, so that the blank will be forced onto the points by positive means, by which all the blanks will be adjusted exactly relatively to the cutters, and thus be uniform in shape. The dog forces the tail-center by swinging around its pivot S, and the connection of the dog and the center ismaintained during the operation by the end of the center resting in the notch of the dog, and being moved against it by the slide G. The dogs have a light spring, T, acting on their heads and toes cl 0 f, to keep them in position for engaging the tailcenters, while at the same time allowing them to move with the centers when thus fixing the blanks; also allowing them to swing out of the way of the centers as they go back tothe holder, at which time they are drawn back by the switches N to discharge the turned blank, and to prepare for taking another blank. The switches N have a little movement between the stop-pins g to give way when the tail passes it, and then swing forward enough to catch the projection a, when the movement of the center in return to the blank-holder begins, and they have a spring, h, 'for throwing them forward to engage the centers. The blank is discharged from the centers when the tail-center is pulled back by switch N. The cutter-frames L are released to move forward to meet the blank by a pin, 2 on the sliding frame G, which strikes against the incline j on the catch l\'[ just before the frame stops in the movement of the pin toward the holder. When released, the frame is pushed forward by a spring, T, and it is arrested by a cord, U, at the point where it is required that the blank shall come to the cutters. The live-centers are turned by the belt V from the pulley V5 on the drivingshaft X, and the cam is driven from the same shaft by a counter-shaft, Y, and suitable rcducingpulley for slowing the motion.

The machine may, of course, be single-act ing on the same principle, using only one lathe; but, by usng two lathes and cutters, and a double block-holder, the capacity of the machine is doubled.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. The swinging knife K, combined with the sliding frame L, as and for the purpose described.

2. The combination of a switch, N, dog K, and a spring, 0, with the tail-center of a lathe moving forward and backward between the work-holder and the cutter, substantially as specified.

3. The combination of guard Q with the work-holder, lathe-centers, spring 0, and dog K, substantially as specified.

4. The oscillating cutter-carrier L, spring T, cord U, catch M, and reciprocating stud i, combined and arranged substantially as specified.

BENJAMIN B. OOKINGTON. ANDREW J. OOKINGTON. WVitnesscs:

CHARLES MAI-IURIN, JAMES W. ENGLISH. 

